Answers

Add 18/10 and 42/81

1^st number: 1 8/10, 2^nd number: 42/81

18/10 + 42/81 is 313/135.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 10 × 81 = 810,
   18/10 = 18 × 81/10 × 81 = 1458/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   42/81 = 42 × 10/81 × 10 = 420/810
4. Add the two like fractions:
   1458/810 + 420/810 = 1458 + 420/810 = 1878/810
5. 1878/810 simplified gives 313/135
6. So, 18/10 + 42/81 = 313/135
   In mixed form: 243/135

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